mips_cdmm_setup(9)

💅 mips_cdmm_setup(9)

okay so bestie, welcome to the Kernel API Manual ✨ — this one's a lil function called mips_cdmm_setup, and honestly? it's giving "just make sure the bus is up and running before you do anything cute." 🚌💖

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🌸 NAME 🌸

mips_cdmm_setup — bestie's whole job is to ensure the CDMM bus is initialised and usable. that's it. that's the vibe check. no cap. 🫶

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✨ SYNOPSIS ✨

int mips_cdmm_setup (struct mips_cdmm_bus *bus );

like, it takes one thing, and returns an int. iconic, minimal, efficient. we love a main character who doesn't overcomplicate. 👑

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🎀 ARGUMENTS 🎀

• bus — a pointer to the bus information for the current CPU. 🧚 and here's the cute part: IS_ERR(bus) is already checked inside, so the caller doesn't need to check it themselves. like, it's handled. don't worry about it. you're welcome. 💅

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💜 DESCRIPTION 💜

okay so the one thing you actually have to do yourself, bestie — and do not skip this — is prevent migration to another CPU. 😭 there are two ways to slay this:

1. disable pre-emption, or
2. run from a pinned kernel thread.

that's the whole rule. no migrating mid-call. periodt. 🚫🦋

and then the returns, which are literally:

• 0 on success 🎉
• -errno on failure 💀

fr fr, that's it. keep your CPU pinned and you're golden. 🌈

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🌟 SEE ALSO 🌟

the whole friend group, assembled:

• Kernel file ./drivers/bus/mips_cdmm.c
• struct mips_cdmm_work_dev(9)
• mips_cdmm_void_work(9)
• mips_cdmm_int_work(9)
• BUILD_PERCPU_HELPER(9)
• mips_cdmm_driver_register(9)
• mips_cdmm_driver_unregister(9)
• struct mips_cdmm_bus(9)
• mips_cdmm_get_bus(9)
• mips_cdmm_cur_base(9)
• mips_cdmm_phys_base(9)
• mips_cdmm_early_probe(9)
• mips_cdmm_release(9)
• mips_cdmm_bus_discover(9)
• BUILD_PERDEV_HELPER(9)
• mips_cdmm_cpu_down_prep(9)
• mips_cdmm_cpu_online(9)
• mips_cdmm_init(9)

go read them all, iykyk 📚✨

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aaand that's the page!! 🎀 this lil gem lives in ./drivers/bus, stamped October 2026, and it's filed under mips_cdmm_setup(9) — mwah, go off bestie 💖🔥💅